STAMFORD -- Riding the momentum of a hot rental market, Harbor Point developer Building and Land Technology is seeking two more apartment complexes in the South End.

The Zoning Board is to conduct a Monday public hearing on the developer's plan for a five-story, 102-unit building on Market Street and 17,600 square feet of office space in an existing historic building.

A proposal for a six-story, 257-unit building on an adjacent site on Market Street also is awaiting zoning review.

Since breaking ground on Harbor Point in 2008, BLT has largely focused on residential development. The two projects on Market Street would complete all the housing planned for Yale & Towne. The site, which was the headquarters for the famous lock manufacturer and is considered part of the 80-acre Harbor Point development in the South End, is approved for a total of 1,140 housing units.

Altogether, Harbor Point is expected to add 4,000 housing units.

The Lofts, the first residential project at Yale & Towne, opened in 2010 on Henry Street as a conversion of three former factory buildings into a six-story, 225 loft-style apartment building. The following year, opposite from The Lofts, BLT unveiled LockWorks, a modern-looking six-story residence with 329 units.

The developer is now at work on a 15-story building at Pacific and Henry streets that is to add another 227 units.

In keeping with the city's affordable housing policy, 10 percent of the units at Yale & Towne are designated for low-income families.

Along with housing, Yale & Towne also calls for 130,000 square feet of commercial space and more than 300,000 square feet of retail space, roughly a third of which has been filled by Fairway Market, a N.Y.-based supermarket chain.

Monday's hearing will mark the first Zoning Board appearance by BLT since the spring, when board members stepped up pressure on the developer to replace a boatyard that had been on a waterfront property zoned as part of Harbor Point. Under zoning conditions, the boatyard was singled out as a water-dependent use to be preserved by the developer.

In what is expected to be a packed agenda on Monday, board chairman Tom Mills said he expected to discuss the status of a cease-and-desist order against BLT for removing the boatyard. The developer has asked the city for permission to gain access to the site to begin remediation work.

John Freeman, a spokesman and attorney for BLT, did not respond to a request for comment.